Cupel-furnace



(No Model.)

J. LYNCH.

GUPEL FURNACE.

No. 275,232. Patented Apr. 3, 1883.

WITNESSES: INVENTOR M ga wz/ %M ATTORNEYS N. PETERS. Plwlo-Uli wgnphcn Washington. a. c

UNITED STATES PATENT OFFICE.

JOHN LYNQH, OF ALLEGHENY CITY, PENNSYLVANIA.

CUPEL-FURNACE.

SPECIFICATION forming part of Letters Patent No. 275,232, dated April 3, 1883.

Application filed December 22, 1882. (No model.)

To all whom it may concern Be it known that 1, JOHN LYNCH, of Allegheny City, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Uupel-Furnaces, of which the following is a full, clear, and exact description, reference being bad to the annexed drawings, forming part of this specification.

This invention relates to the class of furnaces employed in assaying and refining precious metals; and the object of the invention is to provide means for a more convenient and effective handling of the cupel.

In the drawings, Figure l is a front elevation of the furnace, showing the tackle for handling the cupel; and Fig. 2 is a vertical section through the furnace and cupel.

A indicates a cupel-furnace of usual construction, having a recess, B, formed underneath the same, and an opening, 0, above the recess for receiving the cupel D. Heretofore such a cupel-hearth has been supported upon the ends of vertical screws, which are screwed through cross-bars arranged in the said recess, and these screws are to be operated by hand to adjust the cupelhearth in any desired position.

Owing to the heat that is imparted to the screws and the difficulty of rapidly adjusting the screws in the above construction, I use only one set of screws, E, which are supported in the cross-bar F at one end of the cupel. The opposite end of the cupel is provided with staples G, in which arms H areinserted; and these arms are made to project without the recess B, in orderthat a tackle may be connected thereto for raising and lowering said end of the cupel.

The tackle I may be supported either upon a standard, J, on the furnace, or suspended from a support arranged above the furnace, and is connected to the arms H by a cross-bar, K, preferably of angular form, as shown, and the screws L and adjusting-brackets M. By

'means of the screws L, which screw into the brackets M, as also of the screws E, the cupel may be adjusted with either side lower than the other, in order that a new discharge-channel may be utilized at each operation,as is required in the art. A series of channels are to be formed for this purpose, and all but one are to be closed temporarily, and the position of the cupel is to be varied according to the location of the channel that is to be used. With the use of the tackle the proper adj ustments of the cupel may be made with comparative ease and dispatch. The ends of the vertical screws E are to be setin recesses formed in a suitable plate secured to the bottom of the cupel.

While preferring the form of the invention above described, I may vary the construction in various particulars, according to circumstances, and therefore do not confine myself to the exact arrangement of parts shown.

What I claim as new, and desire to secure by Letters Patent, is

1. The combination, with acupel, ot' the screws E, supported in the cross-bar F, near one end thereof, and the supporting-tackle I, connected to arms H on the opposite end of the cupel, substantially as shown and described.

2. The combination, with a cupel having screws E for supporting and adjusting the same at one end, of tackle I and means for connecting the same to the cupel, substantially as shown and described.

3. The combination, with a cupel having screws E for supporting and adjusting the same at one end, of tackle and adjustable means K L M for connecting the same with the cupel, whereby thepositiouofthecupelmaybe equally adjusted at each end and in a convenient manner, substantially as specified.

JOHN LYNCH.

Witnesses:

A. G. LYNE, SoLoN O. KEMON. 

